A statement from the club reads:
"Peter, who recently confirmed he would not be renewing his contract at the club, led Dundee United to Scottish Cup success in 2010 and helped the squad qualify for European football on three consecutive occasions. He leaves with the thanks of everyone at the club and best wishes for the future."
Houston's stats:
Matches - 121
Won - 48
Drawn - 37
Lost - 36
Win Ratio - 40%